controli2c

link to the youtube video

Arduino code:

You can find below the code c used for the Arduino to initialize I2C and use data sent by the Raspberry Pi.

#include <Wire.h>

#define SLAVE_ADDRESS 0x12
int dataReceived = 0;
const int led1 = 2;
const int led2 = 3;
const int led3 = 4;
const int led4 = 5;
const int led5 = 6;

void setup() {
    Wire.begin(SLAVE_ADDRESS);
    Wire.onReceive(receiveData);
    Wire.onRequest(sendData);

    pinMode(led1, OUTPUT);
    pinMode(led2, OUTPUT);
    pinMode(led3, OUTPUT);
    pinMode(led4, OUTPUT);
    pinMode(led5, OUTPUT);
}

void loop() {
    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    digitalWrite(led5, LOW);
  
    if(dataReceived & (1 << 0) ){
        digitalWrite(led1, HIGH);
    }
  
    if(dataReceived & (1 << 1) ){
        digitalWrite(led2, HIGH);
    }
  
    if(dataReceived & (1 << 2) ){
        digitalWrite(led3, HIGH);
    }
  
    if(dataReceived & (1 << 3) ){
        digitalWrite(led4, HIGH);
    }
  
    if(dataReceived & (1 << 4) ){
        digitalWrite(led5, HIGH);
    }
}

void receiveData(int byteCount){
    while(Wire.available()) {
        dataReceived = Wire.read();
    }
}

void sendData(){
    int envoi = 1;
    Wire.write(envoi);
}